The certas valve (id (b)(4)) was not returned for evaluation after three good faith attempts (gfes) were made.Lot number information has been provided; therefore, device history record (dhr) was reviewed, and no anomalies were found.The root cause(s) of the reported issue could not be determined.However, the possible root cause for the issue reported by the customer, could be due to biological debris and protein build up interfering with the valve mechanism.Since no valve was returned for investigation this could not be confirmed.If additional relevant information becomes available in the future, this complaint will be reopened, and the respective evaluation performed.Trends will be monitored for this and similar issues.At present, we consider this complaint to be closed.Additional information received - was the issue detected during or after implantation? answer: after.- current status of the patient.Answer: doing well, but has had two subsequent vp shunt revisions on (b)(6) 2023.- did the patient have any sigs and symptoms due to the product problem? answer: yes, shunt malfunction radiographically, but not symptomatically.- was the valve replaced? answer: a new fixed medium pressure valve was placed on (b)(6) 2022 at the time of explant of the certas valve.
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The certas valve (id 828810pl) was returned for evaluation.Device history record - the product code 82-8810pl with lot 6105683, conformed to the specifications when released to stock.Failure analysis - the position of the cam when valve was received was at setting 4.The valve was visually inspected; biological debris around the cam was noted.The valve was hydrated.The valve was tested for programming and pressure then failed the test.The valve passed the test for occlusion, leaks and reflux.The valve was disassembled.The valve was visually inspected under microscope at appropriate magnification: biological debris was found on the motor.The root cause for the issue reported by the customer is due to biological debris and protein build up interfering with the valve mechanism.As during the investigation, the biological debris were found.
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